fix: invert backend sorting to make new payloads appear first and fix group sorting

src/pages/ClientDetails.tsx

@@ -2,6 +2,7 @@ import { useMemo } from 'react';
 import { useParams, Link, useOutletContext } from 'react-router-dom';
 import { ArrowLeft, User, Tag, Package, DollarSign, Clock } from 'lucide-react';
 import type { OrderData } from '../types';
+import { parseOrderDate } from '../dataService';
 
 const ClientDetails = () => {
   const { name } = useParams<{ name: string }>();
@@ -37,9 +38,7 @@ const ClientDetails = () => {
 
     // Sort grouped orders by date descending
     const groupedOrders = Object.values(groupedOrdersMap).sort((a, b) => {
-      const [dayA, monthA, yearA] = a.date.split('-').map(Number);
-      const [dayB, monthB, yearB] = b.date.split('-').map(Number);
-      return new Date(yearB, monthB - 1, dayB).getTime() - new Date(yearA, monthA - 1, dayA).getTime();
+      return parseOrderDate(b.date).getTime() - parseOrderDate(a.date).getTime();
     });
 
     return { groupedOrders, totalSpent, totalItems };